#1
Hey guys, so recently in practice I blew a power valve in my Framus Cobra 100 watt head. I've owned the amp for about 3 months now (there's only been one previous owner). I'm just curious, just exactly how hard is it to blow a power valve? It's got me a little worried there may be some fault with my amp as I never abuse it, never really crank it too high and its only getting light - medium use (Around 5 - 6 hours a week). The guy I bought it from said that the valves were fairly new and it had been serviced. I know sometimes valves can just blow, but if anyone has any particular knowledge on this, it'd still be good to know.
#2
Unless you find it happens multiple times and quite frequently you shouldn't need to worry. One time isn't enough to be sure, just get a new matched or quad set and use your current working ones as spares.
"Air created the greenness. And once you've got something, that leads to otherness." - Karl Pilkington.